Unreal Engine Issues
Unreal Engine Issues
Users can't change flags on asset entries in PSD when the asset was added via a Branch In notify
UE - Anim - Gameplay - Mar 19, 2025Assets added to a PSD via a Branch In notify can't have their flags changed within the database. When the flags (like mirror, disable, etc) are changed, they revert back to the original value when ...
GAS: RemoveReplicatedLooseGameplayTag on unadded tag causes it to be replicated
UE - Gameplay - Gameplay Ability System - Nov 17, 2022A UDN user found that calling AbilitySystemComponent->RemoveReplicatedLooseGameplayTag(TagToRemove); while the gameplay tag was not in the TagMap, will create an entry for it with count 0, see ...
Crash when a Deferred Decal (Translucent) base material has a Nanite Override (Masked Surface) Material and the mesh has Nanite + Ray Tracing enabled.
UE - Graphics Features - Ray Tracing - Aug 14, 2025A crash occurs when Nanite override material instance is used in a project with Ray tracing enabled where: 1 The Material assigned to the static mesh uses Deferred Decal / Translucent and the Nani ...
GenerateProxyMesh causes incorrect transform in ISM using Scale
UE - World Creation - Worldbuilding Tools - HLOD - Aug 20, 2019MeshVertex has been converted by component transform before being converted by instance transform. It is ( Vertex * ComponentTransform ) * InstanceTransform. I thought it has to be converted by (Ve ...
FCDODiffControl doesn't properly account for lists of differing size.
UE - Gameplay - Blueprint - Sep 21, 2016FCDODiffControl doesn't properly account for lists of differing size. The issues are marked in the following code:int IterOld = 0; int IterNew = 0; while (IterOld != OldProperties.Num() || IterNew ...
TickComponent and PostPhysicsTick in SkeletalMeshComponent can cause simultaneous read/write access
UE - Anim - Runtime - Jan 18, 2023When a SkeletalMeshComponent is restarted by calling in order of SetSimulatePhysics and SetComponentTickEnabled, the TickComponent and EndPhysicsTick are executed simultaneously. As a result, the ...
Crash due to D3D device being lost. (Error: 0x887A0006 - 'HUNG')
UE - Graphics Features - Feb 22, 2017This JIRA has been made to consolidate all "D3D device being lost. (Error: 0x887A0006 - 'HUNG')" crashes into one. Previous Jira tickets include:[Link Removed][Link Removed][Link Removed][Link Remo ...
Packaging for HTML5 seems to have grown in package size
UE - Platform - Mobile - Aug 30, 2016The size of packages for HTML5 has greatly increased since 4.10.4 to 4.11.2 and has since increased. Example: First person template, no starter content - size of whole HTML5 folder once packaged: 7 ...
SAnalogSlider moves slowly when step size is large
UE - Editor - UI Systems - Slate - Mar 6, 2024SAnalogSlider calculates FastestStepTime by multiplying the step size value by a constant, resulting in high numbers for larger step sizes. This gets lerped from 1 and used as the repeat time, resul ...
BP timelines: when converting internal curve to external, the external curve isn't used until BP is recompiled
UE - Framework - Blueprint Editor - Aug 28, 2023Blueprint timelines: when converting an internal curve to an external curve asset, the curve asset's data isn't used until the blueprint is recompiled. This is confusing as there is no indication th ...